Title :
A 1.2-mW CMOS frequency synthesizer with fully-integrated LC VCO for 400-MHz medical implantable transceivers
Author :
Italia, Alessandro ; Palmisano, Giuseppe
Author_Institution :
DIEES, Univ. di Catania, Catania, Italy
Abstract :
An ultra low-power frequency synthesizer for 400-MHz medical implantable transceivers was designed and fabricated in a 0.13-mum CMOS technology. The circuit is implemented by means of an integer-N phase-locked loop, which features a fully-integrated LC VCO and 160/480-kHz programmable channel steps. The frequency synthesizer exhibits a phase noise better than -96 dBc/Hz at 100-kHz offset frequency for all the supported channels. The measured settling time is around 500 muS and the reference spurs are lower than -52 dBc. The power consumption of the frequency synthesizer is only 1.2 mW from a 1.2-V supply.
Keywords :
CMOS integrated circuits; UHF devices; UHF oscillators; biomedical electronics; frequency synthesizers; phase locked loops; programmable circuits; telecommunication channels; transceivers; voltage-controlled oscillators; CMOS frequency synthesizer; frequency 100 kHz; frequency 160 kHz; frequency 400 MHz; frequency 480 kHz; fully-integrated LC VCO; integer-N phase-locked loop; medical implantable transceivers; phase noise; power 1.2 mW; programmable channel steps; size 0.13 mum; voltage 1.2 V; CMOS logic circuits; CMOS technology; Charge pumps; Energy consumption; Frequency synthesizers; Medical services; Phase locked loops; Phase noise; Transceivers; Voltage-controlled oscillators; CMOS integrated circuits; frequency synthesizers; implantable biomedical devices; low-power circuits; medical services; phase-locked loops (PLLs);
Conference_Titel :
Radio Frequency Integrated Circuits Symposium, 2009. RFIC 2009. IEEE
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-3377-3
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2009.5135552
